Amazing Unit 3 flashcardziz

Front

What is velocity?

Back

Velocity is a vector quantity that refers to the rate at which an object changes its position. It includes both speed and direction.

Front

What is the role of an airbag in a car during a crash?

Back

An airbag increases the time of the crash, which decreases the force experienced by the occupants, thereby enhancing safety.

Front

What is an inelastic collision?

Back

An inelastic collision is a type of collision where the total kinetic energy is not conserved, and the objects stick together after colliding.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented as p = mv.

Front

How do you calculate the momentum of an object?

Back

Momentum (p) is calculated using the formula p = mass (m) × velocity (v).

Front

What happens to momentum in an explosion?

Back

In an explosion, the total momentum before the explosion is equal to the total momentum after the explosion, according to the law of conservation of momentum.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before an event (like a collision or explosion) is equal to the total momentum after the event.

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as impulse = force × time.

Front

What is the formula for calculating impulse?

Back

Impulse (J) can be calculated using the formula J = F × Δt, where F is the force applied and Δt is the time duration.